Valve extension for inner tubes



E. R. DOEPKE VALVE EXTENSION FOR INNER TUBES Filed D86. 14, 1946 n-f-foRNEY May 23,v 195o Patented May 23, 1950 'I UNITED STATES PATENT OFFICE VALVE EXTENSION FOR INNER TUBES Edward R. Doepke, Walla Walla, Wash.

Application December 14, 1946, Serial No. 716,336

3 Claims. (Cl. 152-415) My present invention relates to an improved valve extension for inner tubes and is especially adapted to be used when repairing or replacing vehicle tires and tubes under circumstances conventionally at hand under which the stem of the deflated tube in the tire is diflicult to align and insert through the rim opening.

With the extension of my invention the tube stem may receive the device before deflation and the elongated stem will be readily available and accessible through the wheel rim.

In the accompanying drawings I have illustrated two complete examples of the physical embodiment of my invention according to the best mode I have thus far devised, but it will be understood that various changes and alterations may be made in the exemplied structure within the scope of the appended claims.

In the drawings:

Fig. 1 shows a section oi. a tire rim and the extension attached to the valve stem.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on line 13-3 of Fig. 2 showing the escape ports.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 2

Fig. 5 is a modied form that can also be used as an extension.

Referring now to the drawings wherein I have illustrated the present preferred embodiment of my invention I have shown the conventional wheel rim 2 and tire 4 confining la tube not shown and the valve stem 6 has therein a conventional valve core 8 and rod I0.

Adapted to threadedly engage the stem 6 I use a barrel -cylinder I2 having a central bore I4 the gasket I6 sealing the stem in the recess of the cylinder. An insert LIB has a central longitudinally extending bore which terminates in a lateral port 2|, and a lateral bumper '22 which depresses the rod I0 allowing the air in the tube to pass into the bore I4.

Upwards of the cylinder I2 and threadedly engaging the collar '24 I use a cap 2G formed with a central bore 28, and a lateral port 30. An extension 32 is topped into the bore I4 and has a longitudinal passage 34 with a lateral port 36. A collar 38 on the extension is confined between the flange 40 of the cap 26 and the end of the cylinderIZ.

In an upper chamber 42 aligned with the passage 34 is threaded a valve core 44 of conventional design.

As shown in Fig. 2 the device is arranged to release the air under pressure in the inner tube. By screwing down the barrel I2 bumper 22 of the insert I8 contacts with and depresses rod ID, as in Fig. 4, thus releasing air through the core '8, port 2| and bore 20 to passage I4 of the barrel, and thence through ports 36 and 36. To set the device for the yadmission of air, the extension 32 is rotated in the cylinder bore I4 until the port 36 is closed and covered by the bore wall I2. Then by applying air pressure to the core 44, the air will pass through passage 34, bore I4, bore 20 and through the core `I5.

Reverse movement of the extension will permit discharge of air through core 6, bore 20, bore I4, passage 34, port 236 and port 36.

In Fig. 5 I have shown a modified form of my invention wherein the barrel 50 is formed with a bore 52 and the insert 54 bored at 56 has a core rod depressing bumper 58.

The extension 66 has a stud 62 formed with a port 64 and central bore 66, the upper portion of the extension being adapted to receive a valve core 68.

When the stud is screwed into the barrel to close port 64 the bleeding of the tube will cease, and air under pressure may be applied into the bore 66, bore 52, passage 56 and to the valve stem and core not shown.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. An extension for valve stems of inner tubes comprising a hollow barrel threaded on the stem, a valved extension threaded on the barrel, port means in the threaded portion of the extension for selectively bleeding the tube or charging the tube, and means in the barrel co-acting with the valve in the stem to render the valve open.

2. An extension for valve stems of inner tubes comprising a hollow barrel threaded on the stem, a valved extension threaded on the barrel, a ported cap over the valved extension forming a chamber, a collar on the extension limiting movement thereof in the chamber, port means in the eX- tension permitting the selective bleeding of the tube into the chamber or the charging of the tube, and means on the barrel co-acting with the valve in the stem to render the valve open.

3. An extension for valve stems of inner tubes comprising a hollow barrel threaded on the stem, a valved extension threaded on the barrel, 'a ported cap over the valved extension forming a. chamber, means on the extension limiting movement thereof in the chamber, port means in the extension permitting the selective bleeding of the tube into the chamber or the charging of the Y tube, and a ported insert in the barrel and a bumper co-acting with the valve in the stem to render the Valve open.

' EDWARD R. DOEPKE.

REFERENCES CITED Y The following references are of record in th lel of this patent:

Number Number muy 1932 

